Red Hat Security Advisory: kernel security, bug fix, and enhancement update

CVE-2026-31431 — kernel: crypto: algif_aead - Revert to operating out-of-place CVE-2026-43037 — kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() CVE-2026-43284 — kernel: "Dirty Frag" ESP XFRM variant is a new universal Local Privilege Escalation (LPE) vulnerability in the Linux kernel CVE-2026-43503 — kernel: net: skbuff: propagate shared-frag marker through frag-transfer helpers CVE-2026-46243 — kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions CVE-2026-46300 — kernel: "Fragnesia" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel CVE-2026-46333 — kernel: Read root-owned files as an unprivileged user